Exhaust-silencer.



To all whom it may coincer/ri:

IFietsers G. HALL, Jr., citizens of the United A UNITED sTATns PATENT orrron.

EDWIN `AUGUS'IU'S* HALL, O'F DANSVILLE, AND FRANCIS G. `HATIL, JR., OF NEWBURGH, NEW YORK.

,EXHAUST-SILENCER.

Specification of Letters Patent.

, Application filed June 16, 1909. Serial No. 502,501.

Be `it known that we, EDWIN A. Hann and Staltes,`residing, respectively, at Dansville, Livingston county, and Newburgh, Orange county, in the State of New York, have in-y vented certain new and useful ImprovementsA in llxhaust-Silencers, of which the following is a specification.

This invention relates to improvements in devices .for silencing the exhaust from internal combustion engines, and the object of our invention is' to rovide a device of this character whereby t e noise of the escaping exhaust, will not only be silenced 'eifectually but also the v exh'zviust gases will be so cooled and condensed as to relieve the enginefrom back pressure. 1

lVe attain our object by constructingr the silencer in the manner illustrated in the accompanying drawings, in which A Figure l presents a side elevation thereof; and Fig. 2, a vertical section.

Like numerals designate like parts in the two views.

vThe body of the silencer, 1, is preferably in the form of a hollow inverted cone; the exhaust from the engine being conducted into the chamber of the silencer through the inlet 2, and being discharged therefrom at the bottom through the outIet 3. At-the top of the silencer there is a water pipe connection at 4, through which water is introduced into the chamber of the silencer, from any suitable source of supply. In general, this will be from the circulating water taken from the engine jacket. At 5, we provide a pet cock to relieve pressure in the silencer when starting the engine; and at the bottom of the silencer we provide at 6a pet cock for draining the silencer of any water which may collect therein after or before running the engine.

Transversely across the chamber of the silencer we provide a series of baille plates 7, 8, 9, and 10, arranged preferably in the manner illustrated in Fig. 2. The baille plates 7 and'S are ositioned opposite the inlet 2, with the baille plate 7 positioned directly under the water inlet 4. The function of this baille late 7 is two fold:-first, it serves as a' sp asher for the water entering at 4, and striking it from above; and second,

it is so placed that the incoming charge of exhaust gas striking it on the underside will be deiiected downward. The baille plate 8 is by'so arranged as to divide theincoming y.cliarge of exhaust gas into two parts and detlect it downward. The baille plates 9 and l0 are so arranged as to change the direction of the exhaust gas in passing through the silencer, and causea thorough mixing of the charge with the water which is being splashed and sprayed from baille plate Tinto the lower portion of the silencer chamber. Inso positioning the baille plates '9 and 10 we have aimed to accomplish the result of mixing the water and heated exhaust charge with as .little frictional loss as possible.

The exhaust gas, on entering the chamber of the silencer, `expands in the enlarged upper end thereof, and is deflected downward with the water spray, the baille plates producing a swirling eifect in the lower part of the chamber. The gas is thus thoroughly vmixed with the water, and cooled and condensed thereby, the water becoming vaporized by its admixture with the heated gas. The combined gas and vapor will then pass oil' through the outlet 3 in a thoroughly cooled condition, and without noise. This expansion and subsequent condensation of the gas will entirely relieve the engine from back pressure. In order that there may be a full discharge through the' outlet 3, we slightly consti-ict the inward end of the passageway leading to said outlet at l1, thence gradually enlarging the opening to its normal size; thus applying the principle of the Venturi tube to the exhaust outlet, so that the outflowing stream of gas will fill the outlet pipe to its full capacity without the formation of a vena contracte.

T o obtain the best results we preferably arrange the baille plates as illustrated in Fig. 2, as from experience we believe that this arrangement produces the utmost eiliciency in effecting the silencingl and condensing of the exhaust. The principal features of the invention, however, we consider to be the arrangement of the baflle plate 7 relatively to the gas inlet 2 and to the water inlet 4.

While this silencer is specially adapted for marine engines it may be employed to advantage in connection with any internal vupon die iop @i combustion angine wiwi@ the neces-my Waei 'sup'piy may be obtained Y' the Condensniinn within the s What 'ws claim as oui: in` sire to secure by Leiters Patent is- 1. A silenciar Coinpiising zi Chrmbez inni'w ing' n lateral gas inie at iis Lippe? end nini in discharge @niiet at its lower and7 bain@ J1* plate opposite the i111et,'and means for.' naif lnitting siicznn of water to the chamber: L". upon the top mi the baffle plaie,

@niiet ai ow end, un inclined nosie me' inist `t0 deflect the 30 admitting a is the chamber upon the e piae? and one or more En@ flowar., portion of the ...v nppnsia incline to that of 35 x Silencaf comprising chamber havj ini i; at one sidffdjacent its upper :imi s ha'fg@ ouiiet on the opposite 2 A Silencer cmnpxfising ai Chambe'. hav Side ir; im, s and, ih@ inclined bafiie plates 40 ing n lateral inlei ai; its n; per end und .fi 1 nd. 8 imno 'e the inlet to deflect the indischaige @niiet at is limer anni, an. inl g imimayflh the oppositely inclined milio pini@ opposite ih@ inletl 'to' iw clins@ 'balie p11' 9 :ind l0 adjacent the eci', the gas downwind, and nie/zins im :mi i C i, and means :gm: admitting a stream of of lWater the dimmi er er 'to die chamber upon `the top of 4.5

ie milie piane. i f y A Silencer cmnprsiw a chamber himing a lateral gas inlet ius lippen end. and

stinnmy whereof'lwe have affixed our 1 n w nig? nnmsin pragma-e of twv Witnesses. a disclmige Uutet at HS lower and, wn EDE/VEN 4 IJUSTUS HALL.A

inclinei buiile plates one nove di@ other op i posit@ ih@ inietin divide *die iniiowing and ffie'eci i-downmi'd, und means Lim' ad miling a. .Lsienni 'Wiiiei ze th. upm ne ihn uppsii A man@ f. compising; ingu miami gars ini. at iis Tf ""LNCES Cn HALL, JR. 

